If you go to the properties of the Main and Auto Summary partitions you can use the button: "Rebuild Index". But there isn't any explanation to find what exactly happens after you press this button. The help only tells you this: "Select Rebuild Index to manually rebuild the index"
After pressing the button, the content of the folder "C:\Historian\Data\DataIndex\IndexCircular" will be wiped. After 5 to 10 minutes, you will see appearing some History blocks in there.
Who can explain me what exactly happens. I don't believe the Runtime database is touched when using this rebuild function, so it has nothing to do with a rebuild of any indexes on tables.
When to use? Only when you cannot retrieve values for particular tags? Or is ir recommended to use this on a regular base?